Meter-testing cut-out.



T. E. MURRAY, Jn. METER.TESTING'CUT-OUT.

' APPLICATION FILED DEC. 2. I9L5. 1 ,1 9%,5471 Patented July 25, 1916..

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- al wewroc LE1 W2 Warm T. E. MUR R 'Y, In. METER TESTING CUT-OUT.

KPPucATIoN ILED DEC. 2. ms.

Patented Til-I3 25, 1916.

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[1 [1E1 tj [1-2 rat] [1 [1 [1 17 V dttoui T. E. MURRAY, JR.

- METER TESTING CUT-OUT. 7

APPLICATION FILED DECQ [9151 7 1,1 QQ WJYYM Patented July 25,1916.

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5] mmwtoz 3 51 awe anew mnrEDsT THOMAS E. MURRAY, JR, or BROOKLYN, New YORK, AssIeNoa TO MURRAY, or NEW YORK, 1v. Y.

THOMAS E.

METER-TESTING CUT-OUT.

Patented July 25, 191.6.

Applicationfiled December 2', 1915. Serial No. 64,692.

To all whom/it may concern .Be it known that I, THOMAS E. MURRAY,

' Jr., a citizen of the United States, residing 4 at. Brooklyn, in the county of Kings and ing Cut-Outs, of; which the following is a.

- specification.

The' inventlon is a meter testing device, wherein the multiple pivoted levers of a service switch cooperate also with contacts on a separate device, with which contacts the testing. apparatus is connected. The -said device also cooperates with the line 'conducf-' tor terminals to shunt the load around the v meter. IVhen the device here a gang plug-is placed in position, the load becomes shunted aroundthe meter. The switch levers are then opened and moved to cooperate with the testing contacts on said device. The 'in-.

troduction of a bridge between the terminals of the pair finally completes the circuit meter and testing apparatus.

1 In the accompany ng drawmgse-Figure 1 is a plan view of the lnstrument, the switches being closed. Fig. 2 is an end and Flg. 3 1s a side elevation, with.the parts as shown :in

Fig. 1. Fig. 4 is an end and Fig. 5 a side ele- .6 is a side elevation and Fig. 7 2. plan view, showing the gang plug in place and the switch levers opened. and cooperating with the contacts 35, 36, 37, 38, 39 on the. gang plug. Fig. 8 is a perspective viewof the gang plug separately. Fig. 9 is an electr cal diagram corresponding to Fig. 1, showlng the circuits closed by the service switch through the meter to the customers load.

Fig. 10 is asimilar diagram corresponding to Fig. 4, showing the circuits when the gang plug K is in place. Fig. 11 is a similar diagram corresponding to Fig. 6, showing the circuits when the gang plug is in placeand the service switch levers are cooperat ng with the contacts 35, 36, 37,38, 39, this being the condition while the test is being made. Fig. 12 is a separate perspective view of the bridge N, shown also in Figs. 7 and 11.

Similar numbers and letters of reference indicate like parts.

- Referring first to Figs. 1 and 9: 1 1s the base of the instrument. On-said base are the meter terminals 2, to which are pivoted 56 the switch levers 3,

of current'coilsfof the meter through the vation, showing the-gang. plug in plate. Fig. 4

4, 5, 6, 7 connected by a. i

bar-8 of insulating-material, provided with an operating handle 9. Said connected levers'form the service switch, and cooperate row P1. The plates ofrow O are connected to the line conductor terminals 16, 17, 18, 19.,

20, preferably through fuses 21, as shown in.

Fig. 9. Under normal running-conditions,

the positive and negative supply leads A, B,- Fig. 9, are connected through said fuses to 1 the terminals 16, 20; the positive and nega- {tive load leads C, D are'connectedto the-ter-.

'n'nnals 17 19, andthe neutral lead E is'con- ;'nected to the terminal} I one current coil F of themet er are connected to "the pivot supports ofievers 3 and 4. The terminals of the other current coil G are edn ected-to the pivot supports of levers6 and 7. he load neutral Hisconnected'to the pivot support of lever 5. The load, represented by lamps, is indicated at I. The potential coil- J is connected across from load neutral H to a terminal of currentcoil G. With the con- The terminals ofv ditions as shown in Fig. 9, the switch levers 3, 4,5,6, 7 being closed, the meter'is in circult wlththe supply and load leads, and

measures the current energy delivered to the customer. I The gang plug,

insulating material, having an operating 'handle M. On the under side of said bar on one side and inclosing contact clip 22.

At the other end of bar L, clips 25 and 26 are electrically connected to a metal plate 29, secured on said bar, integral with which plate is formed a guard-box 30, open on one side and inclosing contact clip 26. Guardboxes 28 and 30 are shown in'section in Fig. 4. By means of a rod 31 extending through the bar L, plate 29 is connected to binding 0st 32 on the upper side of said bar, andv in like manner contact clip 24 is connected a binding post 34. 'Onfone side of bar L are five pairs of atacti ip generally designated by p .K, (Figs. 4 and 8) comprises a bar L of 37, 38, 39, Fig. 8. By no means of metal plates, these contact clips are connected respectively'to binding posts 41, at. 42and 4.3. a

1n making the test of the meter, thefirst stop is to place the testing plug K upon the base, so that its contact clips 22 to '26 receive the contact plates 11 to 15 of row 0, as.

shown in Fig. 4 and in the. diagram Fig. 10. The plate-27 then forms a bridge between leads A and D, and similarly the plate 29 forms abridge between leads B and C. ,The

obvious result is to shunt the "load around the meter, so that the service switch levers 3, l, 5, 6, 7 may be opened without causing any interruption of service to the load. The next step 1s to insert the-ends of the bridge N, Fig. 12, into the binding posts l1, &2, as shown in Figs. 7 and 11. The switch levers are then raised to bring their free ends into cooperation with the clips 35, 36, 37, 38, 39 on the gang plug K, as shown in Figs. 6, 7 and 11. The potential leads of the testing watt-n1ete1 W are connected respectively to the binding posts and 37 (neutral). The

1 current leads are connected to binding posts 39 and 37 (neutral); a load box T being included, as usual, inthe connection to post .meter of the type set forth, and a service switch comprising a plurality of pivoted levers, 'a separate device for shunting the load around the meter, a removable bridge connecting the meter coils in series, contacts rows of contacts to shunt the load around the meter, a plurality of contacts 35, 36, 37,

38, 39 carried by said plug, testing a )parat'us connected to said contacts 35, 36, 3 38, 39, and a removable bridge cooperating with two of said meter terminals for connwting the meter current coils in series: the said switch levers being movable into cooperation with the other row P of said fixed contacts to open and close circuit from supply to load, and with the contacts 35, 36,37, 38, 39 on said plug to open and close circuitthrough said meter and said 'testing apparatus. I r

In testimony whereof ,I have affixed my signature in presence of two witnesses.

THOMAS E. MURRAY, JR,

Witnesses:

MAY T. MCGARRY, Gnn'rnnnn T. PORTER. 

